
#Demo.py；温度转换
# TempStr = input()
# if TempStr[0] in ['F','f']:
#    C=(eval(TempStr[1:-1])-32)/1.8
#    print("C{:.2f}".format(C))
# elif TempStr[0] in['C','c']:
#     F=1.8*eval(TempStr[1:-1])+32
#     print("F{:.2f}".format(F))
# else:
#     print("格式error")

         
# a = input()
# c=eval(a)
# print(c**0,c**1,c**2,c**3,c**4,c**5)

# a = input()
# i=0
# c = eval(a)
# while(i<6):
#     print(pow(c, i))
#     i=i+1

# guess=eval(input())
# if guess == 99:
#     print("猜对了")
# else:
#     print("猜错了")
#异常抛出
# try:
#     while True:
#         pop=eval(input())
#         if pop == 1:
#             print("hello world")
#         elif pop==2:
#             print(pop/0)
#         else:
#             print("对不起，请重新输入")
# except:
#             print("系统错误")  
   

import os

print ("Content-type: text/html")
print ()
print ("<meta charset=\"utf-8\">")
print ("<b>环境变量</b><br>")
print ("<ul>")
for key in os.environ.keys():
    print ("<li><span style='color:green'>%30s </span> : %s </li>" % (key,os.environ[key]))
print ("</ul>")
         


